Blue sulfur dye and process of making same.



the leuco-indoplienol separates eri oil and remains seperetefl throughout whole time of the reeetioii, lout reacts, liowever, rione the less easily emi quietly with e strong evolution of sulfureted hydrogen, lt is kept boiling 'for about eight hours uricler e reflux condenser, for Whieli purpose si boiler with s. stirring apparatus may serve for tireA o eretico. lt is then allowed 'to eool and :io tie solidified fljyest-ull oalre seperated trom the mother-liquor, Wliioli contains onlyv traces of flyestu. The dyestul is tlien dissolved in about si): hundred liters of hot witter with the aid oi twenty kilograms of sodimm sullirl. I5 From `tlie greenish solution pri'iiluoerl it moy lie precipitated either Aoy oxidation-ss, 'for exemple, by s current of eirMor seperated es tlle-leuoo compound best with sodium loi f: er-

Tlie ororluot is 4Altered oil' sud rlrieil. this-oase the leuco body becomes colored is olue ou seoess of oir emi ossuioee o bronze luster, The' flyestuil produces on uuri'iorlorited-Cotton prominently lioiiuti'l'ul blue tones of the aioove- 'tilted properties.

lf in the above exemple therliolzliylsterl uuic-phenolvbe employed, s greener 1olue is duced; fromKpiiribemirloinciso-motli'vli orft'lio-to'luidiiiy 4emi alplis-no olitliol, o red( er one, omi with tl'ie oorrespomliusi mono-ethyl bodies alolue siiiiiliirio slimle to tl'iodiiriethyl- Y emilioflerivetivesi The inrleplienols `from etere may eitlier "be kept lower (in which. oase the reset-ieri will be correspondingly retarded) or higher, in which case ii it oe materially exoeei'lede-e. g., up to i400 to 150 eeiitigrede-iio more speciellvi'ievorelile result is obtained. The process may oe also oorricl out iu closed apparatus and in this oase the uoe'mporeted solution ol)- tairied according to the above exemple ew: ployeil.' Finally, additions to tlie molt. suoli es glyoeriii, may be used or another solvent may be employed `instead ot Water-e e-looliol, Even when boiled on o Weterbetli reitet-ion trikes pleee, being indicated liyV tlic evolution ot sullfuretecl hydrogen, itil-mogli only slow, lout which is accelerated et it higher temperature in outocliives,

l. lie process oi manufacturing Violet to liluo sulfur dyes by treating 'lie iridoplieools from psrri-rlimnins end olpluifrmphtliol iu form. ol their leuoo compounds with alkalioolysullids et e liigli teiripere-ture, solistentislly es described.

'llie manufacture of e. lilue sulfur dye by heating ille iiidoplieool 'from dimethylpsrofpluuylenofliomiu zuid elolie-ooplitliol in torni oltlieir leuco compounds with alkalipoljfsulrle.

il. llie new blue sul'tur rlyestuf obtainable tlie infloplienol from dimethyl-pore- A-fleoerliemin enel slplio-nuplitliol, solo iitmlly :is deserilierlywliicli vforms u darliw 1blue p WCler,-insoluble in water, soluble iii alcohol or lienzene'witli blue color, soluble inv sodium-sulid solution with s olear groenisli color, soluble iii ooneentruted sulfuric seid with brownish eolor, while undergoing decomposition, sind dyeingr oo uriniorclmited Gott-ori beautiful blue shades.

ln witness whereof l have hereunto set my liiu'ul iii presence of two subscribing Wit- @Rouse Gir-Forio, ALBERT @toleriert 

